Biomedical subjects

C S Pederson

Publications and source records attributed to C S Pederson.

11 recordsLinked to original sources

PubMed1969

Fermentation of philippine vegetable blends.

Seven blends of Philipphine vegetables, two of which contained soybeans and one mongo bean sprouts, were prepared for fermentation and study of microbiological and chemical changes. The fermentations were typical lactic acid bacterial fermentations, initiated by Leuconostoc mesenteroides and continued by Lactobacillus brevis, Pediococcus cerevisiae, and L. plantarum. The combination of high acidity and low pH resembled other vegetable fermentations, such as sauerkraut. The procedure offers a method of preserving surplus vegetables, and, in addition, a method for incorporating and preserving the high-protein-containing soybeans.

Journal Article↗

PubMed1968

Lactic acid bacterial fermentation of burong dalag.

The fermented food, burong dalag, prepared in many Filipino homes, was studied to determine the nature of the microbiological and chemical changes that occur during fermentation. This is a lactic acid bacterial fermentation in which the species Leuconostoc mesenteroides, Pediococcus cerevisiae, and Lactobacillus plantarum played the major acid-producing role. The pH was lowered to below 4.0, and about 0.9% acid as lactic acid was attained in 1 week. It was essential to keep the product covered well to exclude air and subsequent growth of yeasts and mold.

Acids↗

PubMed1964

Lipid Alterations During the Fermentation of Dill Pickles.

Analyses of various lipid fractions of sections of cucumbers and of good and bloated dill pickles showed that marked changes occur in all lipid fractions during fermentation. The most striking difference noted was the decrease in the phospholipid fraction. A nearly fourfold increase in free fatty acid, as well as a marked increase in the neutral fat fatty acids and unsaponifiables, occurred. Gas chromatographic analyses of the methyl esters of fatty acids from the various lipid fractions yielded further interesting data. From the analyses, 41 esters were identified; however, 16 of the esters accounted for at least 95% of the acids. Among the marked changes were the increases in linoleic and linolenic acids in good pickles, in contrast to the increase in oleic acid in the bloated pickles. The presence of tridecenoic acid in cucumbers, and its absence in pickles; and the absence of caproic, caprylic, and capric acids in cucumbers, and its presence in pickles, were interesting. The data demonstrated that the lipid alterations that occur during fermentation of cucumbers are analogous to those previously reported for the sauerkraut fermentation.

Journal Article↗

PubMed1956